This item enables you to connect your garden water storage container to a garden hose or draw water with a watering can. It can be connected to water butts, rain barrels, or any other water storage tank using a 21mm hole. To install the adaptor, remove the nut and washer, insert the adaptor through the hole, and then reattach the washer and nut without overtightening. Once the adaptor is fitted, you can attach the supplied tap using a small amount of plumber's tape to seal the threads, ensuring the tap can be aligned in an upright position without any leaks. The supplied tap is made from nickel-plated brass, offering the durability of brass with a shiny, new-looking finish. This tap features two outlets, allowing you to attach additional items without disconnecting your hose, which is especially useful when using a water timer. The back outlet has a 1" BSP thread.